Abstract
This paper deals with the water exchange process in two connected lakes, one of which is connected to the open sea. The field observations are made in polyhaline lakes, Myojin-ike which are connected to the Japan Sea by a pipe. The result of the observations implies that there exist water exchange through porous media to the Japan Sea, besides the pipe flow. A simplified model to predict water level variations in two lakes is proposed considering these processes. The calculation shows a good agreement with the observation.
